Carbureter.



0. SMITH.

GARBURETER.

APPLICATION FILED NOV. 3, 1910.

Patented Mar. 19, 1912.

EZ nucu CO z UNITED STATES PATENT OFFICE.

CLEMENT SMITH, OF TOPEKA,

CARIBURETER.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application filed November 3, 1910. Serial No. 590,490.

To all whom. it may concern:

Be it known that I, CLEMENT SMITH, citizen of the United States,residing at T0- peka, in the county of Shawnee and State ofKansas, haveinvented new and useful Improvements in Carburetors, of which thefollowing is a specification.

My present invention pertains to carbureters; and it has for one of itsobjects to provide a carburetor calculated to spread the gasolene in alarge circle and expose it to an annulus of air, which annulus isincreased in thickness or volume as the speed of the engine with whichthe carbureter' is connected increases, and which after receiving thegasolene is contracted, with the result that the two are thoroughlycommingled.

Another object of the invention is to attain the above end by the use ofa suctioncontrolled plunger valve, and to so guide the said valve as toassure it working freely at all times notwithstanding the fact that thefuel-gasolene prevents lubrication.

illustration of one specific embodiment thereof, while its scope will bemore particularly pointed out in the appended claims.

In the drawings which constitute part hereof: Figure 1 is a verticalsection, partly in elevation, of a'carbureter constructed in accordancewith my invention. Fig. 2 is an elevation taken at right angles toFig. 1. Fig. 3 is a horizintal section taken in the plane indicated bythe line 33 of Fi 1,

- "looking downward. Fig. 4 is a plan 0 the lower section comprised inthe carbureting chamber of the carbureter. Fig. 5 is a detail verticalsection taken on the line 55 of Fig. 3.

Similar numerals of reference designate corresponding parts in all ofthe views of the drawings.

As will beieadily understood the specific carbureting chamber comprisesa main or body section 1 and a base section 2; the latter bein threadedinto the former. The carburetin chamber is provided at its upper endwith a comparatively small or con- .eeoss-bar 19 and surroundin portionof the carburet-ing chamber with a water jacket 8, but do not desire tobe limited to the same, inasmuch as it may be employed or omittedwithout affecting my invention.

In the lower end of the carbureting chardber is a passage 9 for theadmission of air, and in the said passage is the usual easystartingbutterfly valve 10, designed to be operated through a connection which Ihave not deemed it necessary to illustrate or describe.

The base section 2 of the carbureting chamber is provided with across-bar 11, Figs. 1 and 4;. and in said cross-bar 11 is a gasoleneduct 12 with which communicates the spray device of my improvement. In

the best practical embodiment of-my inven-' tion that I have as yetdevised, the said spray device com rises an upstandin stem 13 in whichis a not 14, a horizonta y-disposed and preferably circular head 15 onsaid stem, and a disk 15 connected b screws 15 to said'zhead and spacedthere mm by washers 15, whereby a narrow horizontall disposed gasolenedischarge passage 16 is a forded in communication with the duct 14.Movable rectilinearly in the carbureting chamber is the plunger valve ofthe improvement. This plunger valve comprises a cylindrical portion 17which surrounds the spray device and is provided with an upwardlytapered interior 18, anda cross-bar 19 arranged on the upper end of thecylindrical portion. In said cross-bar. 19'is a'n' aperture whichloosely receives a stem 20, fixed to and rising from the disk '15 of thespray device, and interposed between said disk of the spray device andthe cross-bar 19 is a coiled spring 21, while arranged on the the stem20 is acoiledspring 22. Arrange above and contacting with the spring 22is an adjusting nut 23 which loosely receives the stem 20 and isthreaded into the body sectionfi, and is provided with a handle-24. thate tends through a part of'a 'c'ircle'the operator isenabled to increaseor diminish the yielding pressure which the' spring 22 exerts down iwardly on the plunger valve,.as occasion demands; the spring21servingmerely to.

equalize the Weight of the plunger valve.

By reference to Fig. 1 it willbe noticed that the cylindrical portion 17ofrthe plunger valve is provided with a narrow portion 17 which bearswith an easy sliding fit in the bore of the carbureting 5 chamber andthat elsewhere the "plunger valve does not contact with the wall; of thebore. The said portion -17=- is assisted in guiding the valverectilinearly' in the chamber by the'stem 20, and from this it 2Q.follows that the valve is efliciently guided "and at .the. same time .isadapted to work freely o'r .lightly without liability of binding. inthe'bore. This willbe appreciw ated as materially advantageous when itis i borne in mind that were the beari-ngoftheyalve in the bore ofthe'ohanibermade long enough to enable the valve to guide itself in thebore, the valve would bind in the bore and would be 'liab-le to befixedby foreign substance drawn in with the gasoline especially gasoleneprevents lubrication.

- The operation of my improvement as thus far described is as followsGasolene being supplied to the duct12, and the internal combustionengine withwhich the carbureter is corin'ectedbeing started, the upward'suction'exerted through the carbureter 'passage 3 will draw :the'plunger valve upward 40 in proportion to the increase in speed of thee'ngine," and in consequence as the speed of. the engine increases thevolume or thickness of the annulus of air tliat moves throughth'e'interior of the plunger valve and-past '1 the head'o'fthe spraydevice is increased,

with the-result that at all times the carbureter supplies explosivemixture ofa quality -"best suited to the speedof the engine.

- Moreover as the speed of the en 'ne is di-- 'minished the spring22gradua-l y returns the plunger valve torthe normal. position "fshownin 'Fig.-'1,and in that way assures the'sup'plyof air being commensuratewith V 5 the speed of the: engine. In this. connection it will'benoticed'that it is the taper. bore of" the valve-l7 that increases anddiminishes 1 the vol'um'e-or thickness of the annulus on the up movementand down' movement, re?

'spectively, of the valve -Arrangedatonev oo fside'ofithe'bodyl of thecarbureting cham-" ber'is a float-fchamber 30. This fioatcham, 1 her hasformed integral with-or fixed to ita portion 31, adapted to embrace ,thebody 1-- of the carburetin chamber in such-mannor 'as to hold the oat'chamber to the said inview of the fact that the body 1 and tobe capableof slidin'g up and down onthe same incidental't'o adjusting the helghtof t e gasolene level in the chamber 30. The said ad ustment is eflected through the medium of a screw 8' that is threaded at 32 throughoneside. of the embracing pori'ion: 31 andbears at its lower end on theshelf 83 integral with the section 2 of the carbureting chamber. .Thefloat chamber 30 is supplied with gasolene from a suitable source. ofsupply (not shown) through the pipe 34, and contains the usual valve 35and float 36 that is'fixed to and movable with, the valve. It will alsobe noticed. by comparison of severalof the figures that the floatchamber .30 is connected with .the duct 12 throughthe medium of aflexible tube. section 37, preferably of hollow wire, and consequentlythecon'tinuity'ofthe communication between thechamber 30 and the duct 12will not be'afiected by bodily adjusting the chamber ,30 up or downalso, that the float chamber 30 carries a needle valve 38, which has forits ofiice to control the passage of gasolene from the chamber to theduct 12.

\Vhile I have show n' and described one form of my invention, it is tobeunderstood that I am not limited to thefdetails or the form orrelative arrangement of parts disclosed, but that modifications may bemade within the scope of my inventionas claimed.

Having described my invention, what I claim and-desire to secure byLetters-Patent, is: 1

'1. In a ca-rloureter the combinat on of a carbureting chamber adaptedat one end for the admission of air and having'its opposite endcontracted, a suction-controlled, rectilinearly-movable valve arrangedinjthe intermediate portion of the chamber andha'ving an IIItGIlOI'.tapered toward the said contracted end of thechamber, 'meansadjustablyconnected to the chamber 'at a point between the contracted end thereofand the valve and movable toward ,and'from the valve, 'a springinterposed between said adjustable means and the valve, whereby theadjustable means is 'enabledto regulate the pressure which .the springexerts uponfthe valve, and fuel-supply means located within the valve.

2. Ina carburetor, the combination-"of a carbureting chamber. adapted atone end for the admission of air and havingitsopposite end. contracted,a suction-controlled, recti} linearly-movable valve arranged in the in.termediate portion of the chamber and having an I interior tapered"toward the said ,contrac tedj'end of the chamber, means, ad-

justably connected to the chamber at a'pointbetween the contractedendthereof and the valve and movable toward and from the valve, a'springinterposed between sai'd adji'lstable means and the valve for yleld nglypressing the, 'val e in a direction away from said contracted end,whereby the adjustable means is enabled to regulate thepressure whichthe spring exerts upon the valve, a spring for pressing the valve in theopposite direction, and fuel-supply means ,located within the valve. v

3. In a carbureter the combination of a carbureting .chamber a spraydevice arranged in said chamber, a stem on sai d. spray device, anadjusting nut' threaded in said chamber and loosely receiving said stemand having a portion extending without the chamber, a suction-controlledrectilinearlymovable valve arranged in the chamber and surrounding thespray device and having an interior tapered toward the adjusting nut andalso'having a cross-bar loosely surrounding said stem, a coiled springsurrounding the stem and interposed between adjusting nut and valve, anda coiled spring surrounding the stem and interposed between the chambermovable bodily at .one side of .the carbureting chamber and having aort-ion embracing the latter, a flexible con it intermediate the floatchamber-and the carbureting chamber, and an. adjusting screw threaded inone side of said embracing portion and bearing on said shelf.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CLEMENT SMITH 'Witnesses: h E. E. Bownns S. M. Kn'rrnnmo.

Copies of this oatent may be obtained for 'five cents each, byaddressing the Commissioner of Patents, Washington, D. C." 1

